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147 results about "Mercury-vapor lamp" patented technology

A mercury-vapor lamp is a gas discharge lamp that uses an electric arc through vaporized mercury to produce light. The arc discharge is generally confined to a small fused quartz arc tube mounted within a larger borosilicate glass bulb. The outer bulb may be clear or coated with a phosphor; in either case, the outer bulb provides thermal insulation, protection from the ultraviolet radiation the light produces, and a convenient mounting for the fused quartz arc tube.

Calibration scheme for continuous monitoring of mercury emissions from stationary sources by plasma emission spectrometry

The disclosed invention relates to a calibration method, system and apparatus for a multimetals continuous emissions monitor system (hereinafter "multimetals CEMS"). More specifically, this invention relates to a calibration scheme for continuous monitoring of mercury emissions from stationary sources by plasma emission spectrometry. A source of mercury vapor, preferably a mercury permeation tube, entrains mercury vapor into a constant flow of carrier air. The carrier air mixes with a constant flow of diluent air in an aerosol mixer. The mixer is operably coupled to the analyzer. A gaseous mixture having a calibration mercury concentration flows from the mixer into the analyzer at a constant rate. A graph having coordinates of analyzer signal intensity and mercury concentration is used to plot the calibration scheme. A first signal intensity generated by the analyzer in response to the calibration mercury concentration is used for the first plot on the graph. A second signal intensity generated by the analyzer in response to a blank having zero mercury concentration is used as the second plot on the graph. A linear relationship between the analyzer signal intensity and the mercury concentration on the graph is established from the first plot and the second plot. The slope intercept and slope are used to create a mathematical relationship between the analyzer signal intensity and the mercury concentration. This enables the analyzer to be calibrated by inserting a known mercury concentration into the analyzer and adjusting the signal intensity to conform to the signal intensity calculated from the graph or mathematical relationship.
Owner:THE GOVERNMENT OF THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SEC OF THE NAVY NAVAL RES LAB WASHINGTON

Mercury vapor continuous monitoring device and monitoring method based on diode laser

The invention provides a mercury vapor continuous monitoring device and monitoring method based on diode laser, belonging to the technical field of mercury vapor monitoring. The invention enables the problems that a conventional mercury vapor measuring system has a complex structure and real-time monitoring of mercury emission in conventional mercury vapor measuring is poor to be overcome. The monitoring device comprises a signal generator, a first laser diode controller, a second laser diode controller, a first laser diode, a second laser diode, a first reflector, a dichroic beam combiner, afirst convex lens, BBO crystals, a second convex lens, a beam splitter prism, a second reflector, a spectroscope, a sample cell, a reference cell, a first optical filter, a second optical filter, a first detector, a second detector and a data acquisition analyzer. According to the monitoring method, diode laser absorption spectroscopy is used to realize continuous monitoring of the concentration of mercury vapor, and spectral information of reference gas is utilized to realize selective identification and quantitative detection of gaseous elemental mercury, thereby eliminating interference brought by gas like sulfur dioxide and nitrogen dioxide. The monitoring device and the monitoring method provided in the invention are used for on-line monitoring of mercury vapor.
Owner:SUZHOU RUILAN ENVIRONMENTAL PROTECTION TECHCO LTD

Mercury morphological analysis method based on liquid cathode discharge and mercury vapor generating device

The invention discloses a mercury morphological analysis method based on liquid cathode discharge and a mercury vapor generating device. The method comprises: a mercury-containing sample solution is introduced into a chromatographic column of a liquid chromatograph; a discharge medium carrier flow passes through a sample introduction device and is introduced into a sample introduction capillary tube of a discharge pool with the effluence of the chromatographic column through a tee joint; by taking a metal electrode as an anode, and graphite, platinum or a stainless steel material as a cathode, liquid cathode discharging is carried out to generate vapor which is carried by a carrier gas into a gas-liquid separator; and finally the separated gas is detected by an atomic fluorescence spectrometer to obtain the morphology of mercury. Through the method provided by the invention, organic mercury and inorganic mercury in an object to be detected are effectively separated and detected; and the method has the advantages of small volume, low energy consumption, high mercury vapor generation efficiency and low matrix interference, is simple in operation and can be used for analyzing the morphology of mercury in a biological sample.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
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